CY24488 Datasheet, PDF (1/15 Pages) Cypress Semiconductor – Quad PLL Clock Generator with Serial Interface (I2C)

CY24488
Quad PLL Clock Generator with Serial
Interface (I²C)
Features
•Three output frequencies plus reference out
•Programmable output frequencies via I²C serial interface
•Output frequencies from 4.9152 to 148.5 MHz
•Uses an external 27 MHz crystal or 27 MHz input clock
•Optional analog VCXO
•Programmable output drive strength to minimize EMI
•The non-I²C equivalent is the CY22388 / 89 / 91
•16-pin TSSOP package
•3.3V operation with 2.5V output buffer option
Benefits
•Meets most Digital Set Top Box, DVD Recorder, and DTV
application requirements
•Multiple high-performance PLLs allow synthesis of
unrelated frequencies
•Integration eliminates the need for external loop filter
components
•Complete VCXO solution with ±120 ppm (typical pull range)
Block Diagram
XIN/CLKIN
XOUT
VIN
VCXO
SCLK
SDAT
Serial
Interface
&
Select
Logic
PLL1
PLL2
PLL3
PLL4
Dividers
&
Multiplexers
CLKC
CLKD
CLKE
CLKF
CLKG
Pin Configuration
XIN/CLKIN 1
SCLK 2
SDAT 3
VIN 4
VDD1 5
VSS 6
CLKC 7
CLKD 8
16 XOUT
15 AVDD
14 DNC
13 VDD2
12 VSS
11 CLKG
10 CLKF
9 CLKE
Table 1. Applications and Frequencies
Output Clock
CLKC
Application
Audio
CLKD
CLKE
CLKF
CLKG
iLink
HDMI
Video
USB
Video-Pixel Freq.
Modem
iLink
Video
Ethernet
PCI
Processor
see CLKC/D/E
see CLKC/D/E
Frequencies (MHz)
6.144, 8.192, 11.2896, 12.288, 16.384, 16.9344, 18.432, 22.5792, 24.576,
33.8688, 36.864
24.576
25.175, 28.322
27, 27.027, 54, 54.054, 81
12, 24, 48
74.25/1.001, 74.25, 148.5/1.001, 148.5
4.9152, 11.0592
24.576
13.5, 27, 54, 81, 108
25
33.3333, 66.6666
20, 30, 40, 50, 60, 80, 100
REFOUT or Copy of CLKC, CLKD or CLKE
REFOUT or Copy of CLKC, CLKD or CLKE
Cypress Semiconductor Corporation
Document #: 001-09608 Rev. *A
• 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Revised October 31, 2006
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